<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			//判断是否为非数字类型
			// console.log(Number.isNaN('6'));

			var a = Number.parseInt('6') + 1;
			// Number.parseFloat()
			// console.log(a);
			
			console.log(a.toFixed(5));
		</script>
	</body>
</html>
